The high prevalence of SSD of unknown origin at 6 years of age (3.8%: Shriberg, Tomblin, & McSweeny, 1999), persisting to 8 years of age (3.6%: Wren et al., 2009), places SSD among the most frequently occurring childhood disorders warranting public health resources for research in prevention, assessment, and treatment.

Speech Sound Disorders (SSD) put children at risk for literacy development, reduced peer acceptance, and limitations in vocational options. Our research goals are to understand the causal pathways that lead to each of eight subtypes of SSD so that clinicians can select the appropriate intervention approach for each child, and researchers can conduct studies leading to the prevention of some subtypes of SSD.


Current Projects